Hook and knot forming machine



May 31, 1932. c. KIRCHNER 1,850,532

HOOKAND KNOT FORMING MACHINE Filed Jilly 11, 1931 s Sheets$heet 1 INVENTOR W06 Fan-Z mad BY W 42 W %4 A TTORNEY y 1932- v c. KIRCHNER 1,860,582

HOOK AND KNOT FORMING MACHINE Filed July ll, 1931 6 Sheets-Sheet 3 IN V EN TOR.

. BY 7 Y Zfla/mw WW QZ Z w #164 ATTORNEY y 1932- c. KIRCHNER 1,860,582

HOOK AND KNQT FORMING MACHINE I Filed July 11, 1931 6 Sheets-Sheet 4 I be; H ":8 .97 87' //7 89 P P F 8 7 /#0 I /5 r 2 Q/NVENTOR e9 6mg 1mm May 31, 1932. c. KIRCHNER HOOK AND KNOT FORMING MAC HINE 6 Sheets-Sheet 5 Filed July 11, 1951 6mg 4); BY ZJ 127W fiia A 'ITORNEY y 31, 1932- c. KIRCHNER 1,860,582

HOOK AND KNOT FORMING MACHINE Filed July 11, 1951 6 Sheets-Sheet 6 Patented May 31, 1932' 1 7* UNITED- STATES PATENT: F A

CARL xmcnnnn; or OABTHAGE, .imlssonnr, ASSIGNOR '10 r.nosnrr r ANDIVPLAT'II SPRING BED Ann MANUFACTURING. COMPANY, or oAsrnAGE, MIssonRI; ACOR- PORA'IIION on .MISSOURI noox ann Know FORMING MACHINE Application filed July 11, 1931. Serial No. 550,177.

My invention-relates to improvements in hookand knot forming machines...

It relates particularly to a machine which operates upon an end coil of a spiral spring, such as is embodied-in bed bottoms, spring mattresses, spring seats and the like, for forming said end coil so that it is adapted for connection with end coils of similar springs. I I

In such forming operation it is usual to knot an end portion around the end coil at a distance from the tip of said end portion so as tofprovide an outwardly laterally extending part terinedthe stem; to provide at the "outer end of saidstem a hook adapted to engage the end coil. ofza similar spring; and to form inthe end coil substantially dia metrically opposite saidstem: an oifset portion in the arc of the coil adapted to be engaged by, the hook of the stem of another similar spring. f 7

One of the objects of my invention is to provide in a machine of the kind described novel means bywhich the length of the stem may. be adjustably varied to suit difierent spacings of the assembled springs.

A further object of my invention'is to provide novel means. for makinga bend in the end coil where the knot is formed, so as to form a shoulder against which. the stem bears after the .lmot is formed, and to dispose the free end portion so that the knotting mechanism will reliably engage it pre- I vliminary to the formation of the knot.

Another object of my invention is to provide novel crimping mechanism which forms the offset portion, whereby it may be adjusted for difierent diameters of end coils, and by which the length of the ofiset portion may be varied.

Still another' object of my invention is to provide novelmeans for straightening the form the stem.

My. invention provides further novel aneans for forming the hook at the end of the. stem. I

My invention provides still further a novel machine of the kind described, which is relatively simple, strong, durable, not likeshown in Fig. 13.

ly to get out of ordeig'and is rapid, I

reliable and eflicient in operation.

The novel features. ofmy. invention are hereinafter fully described and claimed.

In the accompanying drawings which lustrate a machine embodying'my improvements, 7 1 I Fig. 1 is a rear elevation of the machine. Fig. 2 is a side elevation, partly broken away and parts omitted, of the machine.

ing broken away and parts omitted.

Fig. 4 is an enlarged top view, partly broken away of a portion of the hook forming mechanism, parts being iomitted.

-F1g. 5 is an enlarged .rearelevationofa portion of the hook forming mechanism,

shown in Fig. 4. I

r Fig. 6 1s a front elevation of what s shown 1n F lgs. L and .5.

Fig. 7 is a section on the plane ofthe linev tary hook forming member andthe mandrel around which the hook-is formed. i I

Fig. 9 is an enlargedside elevation-,partly broken away, of the notchedoscillatory crimping member and the reciprocatory member'which oscillates it.

Fig. 10 is a topview of what isshownin Fig.9. Q I; 1

. Fig. 11 is a plan view of thecompl'eted end coil. j Fig. 12is a side elevationof the same." Fig. 13 is an enlarged front. elevation of the tilting coil bending lever, 'partly broken away, and partsassociatedtherewith.

Fig. l l is a top view of part of what is Fig. 15 is 'a plan viewof the'main rotary 'shaft,and cams. and :pulley thereon. '2 arcuate end portionof thecoll which 1s to Fig. 16 is a plan view, enlarged, of the crimping mechanism.

Fig. 18 and Fig. l9are cross sectionsarespectively on the line 18 -18 *and 19%19 .of Fig. 16.1

Fig; 20 is an enlarged plan"vieW of.-. part- '3 1S p w Of the S me, Partsjbe- 176.0

of the hook bending mechanism, showing one position of the rotary hook forming member.

Fig. 21 is a front elevation, enlarged, of part of the hook forming mechanism.

Fig. '22 is a View similar to Fig. 20, showing another position of the hook forming member.

Fig. 23 is an enlarged horizontal section of art of the crimping mechanism.

imilar reference characters designate similar parts.

1 designates the body of the machine and 2 the legs thereof. 3 is a horizontal rotary main shaft on the body 1 having rotatable on it a driving pulley 4 having driving engagement with the; shaft 3' through any suitable clutch mechanism 5 operable by a link 6 connected to a crank 7 on a pedal shaft 8 having an operating pedal 9'. Fig. 1.

A: verticalstaticnary post 10 having in itsupper end a slot 11 extends upwardly from the body 1, at the rear of an arcuate guard 12 on the body 1. The slot- 11 is adapted to receive the rear side of an end coil 13,1vhich is tube-formed, Figs. 2, 3. 13 and 141.

Whena spring is to be formed, its end coil placed horizontally on the body 1 with the rear side of the coil in the notch 11 of the fixed post 16, the coil encircling the arcu- 'ategnsrd 12, asshown in Fig. 3 and in Figs.

The forward side of the coil 13 is placed in aslot or notch 14' in the upper end of a vertical cylindrical portion 15 of a crimping memher, which extends through and is oseillative ina block 16, which is horizontally forwardly and rearwardly adjustable, to suit coils 13 of 1 diflerent diameters, upon another block comprising an Lshaped member 17 with which the block 16 has sliding dovetail engagement,

as shown in Figs. 3, 16 and 18.

The'etherarmof the L shaped member 17 has horizontal sliding dovetail engagement with aplate 18, so as to be adjustable transvetseiy at right angles to the adjustment of the block 16 upon the block 17. The plate 18 isfastened rigidly to and is a part of the body 1, Figs. 3, 16, 18 and 19;

The 001K117 is held in the position to which it is on the plate 18 by a bolt 19 which extends through a horizontal slot 20 in the block 17 and hasthreaded engagement withthe plate 18. By tightening the bolt 19, its head will engage the front side of the hind! 17. A set screw2l in the block 17 bears on the plate'18 to aid in holding the block inthe position to which it is adjusted, Figs.

' 16 and 19.

A forwlrdly and rearwardly extending bolt 22 having threaded engagement with the 16 extends through a plate 23 Inflated on the front side of the block 17.

The head of the bolt 22 bears against the fruit sidelof the plate 23. A set screw 24 mounted in the block 16 bears on the block 17, so as to hold the block 16 in the position to which it may be adjusted. By loosening the set screw 24, and turning the bolt 22 in the proper directions, the/block 16 may be adjusted. forwardly and rearwardly to the desired position, and then held by tightening the set screw 24, Figs. 16 and 18.

By turningthe bolt 22 in one direction, the block 16 is drawn forwardly. Another set screw 25 extending through and having threaded engagement with the plate 23 bears at its rear end against the front side of the block 16. By turning the set screw 25 in the proper direction, the block 16 will be forced rearwardly, the bolt 22 and set screw 24'being also turned to permit such adjustment, Figs. 23,16 and 19. a ,1-

To oscillate the slotted crimping member 15 so-as to make the offset portion 26 in the coil 13, Fig. 11, to which is to beattacheda hook 27 at the end of a stem 28 of'another coil 13, Figs. 11 and 12, the lowerend of the crimping member 15 has a horizontal crank on the upper side of which is'mounted' a roller 29, the crank being designated by 30, Figs. 9, 10 and 17. Y 1 1 The roller 29 is mounted in a transverse groove 31 in the under side of a farwardly and rearwardly reciprocative member 32 horizontally slidably mounted in the block 16, Figs.2,'3, 9, 10, 1c, 17 and'18.

, For normally forcing the reciprocative member 32 rearwardly and to normally hold the crimping member 15 in the position shown in Fig. 3, and in solid lines in Fig. 10, so that the coil. 18 can enter the slot 14 in the crimping member 15, there is attached to the reciprocative member 32 the rear end of a horizontal forwardly and rearwardly extending tube 33 which is reciprocative' in a hole 34in the block 16, and in which tube is a compression coil spring 35, the frontend of which bears against the block 16, and the rear end of which bears against the reciprocative member 32, Figs. 2, 3, 16, 17 and18. The tension of the coil spring 35 normally forces the member 32 rearwardly. a

To force the reciprocative member 32 forwardly so as to turn the crimping member 15 to'the dotted position shown in Fig. 10 and to the position shown in Figs. 16 and 17, the following described mechanism is employed.

Referring particularly to Figs. 2, 3, 16 and 17 36 designates an upright pushing member the upper end portion of which is adapted to reciprocate forwardly and rearwardly, and in moving forwardly it"engages the rear end of the reciprocat-ive member 32, and pushes it forwardly, thereby through the roller 29 and crank 30 turning the crimping member 15 from the position shown in solid lines in Fig. 10 to the dotted position in said figure, thus forming the offset 26 in a coil 13 -mounted in the slot 14.

? The pushing member 36-between itsf ends is pivoted by a horizontal transverse pin 37 to the forward end of a horizontally reciproca- -tive rearwardly:extendingbar 38, Figs. 2, l6

and 17,; the under'sideofwhich rests 011a iroller '39 mounted. on a'vertical plate 40 dependingfrom thebody 1." T he rear end of the. bar 38 is pivotedby a transverse pin 41 to the lower end of an upright link 42, the upperendzof which is pivoted by a transverse pin 43 to a plate 44 mounted on a part of the body 1. r L

. .On, the main shaft 3 is secured a cam 45 which in revolving engages the front side of a roller 46 mounted; on .the'lmk42.

During each revolution of the main shaft 3,

' thefc'ame45 engages the, roller 46and swings frearwardly t-hedlink .42, thus moving reariwaizd 'ly the bar 38 and the pushing member 36, which pushes rearwardly the reciprocativemember 32 and thus turns the crimping member 15'soas to form the offset 26 in the coil 13: When the cam: permits, the coil .Zspring 33 forces toward the front the memthe; lower portion of the pushing'member 36,

at the rear of the pivot pin 37, has through it an upwardly extending threaded hole in pjwhich is a'djustably fitted a screw 47 the upperend 'ofwhich bears against the under side of the bar'38 at the rear of thepivot pin 37.

B. ad'ustin thelscrew 47-i1mvardl and D L downwardly, the upper end ofthe pushing :member 36-may be moved forwardly and rearwardly. 'When the=screw 47' is moved downwardly the stroke of the reciprocative 'member 32 will beshortened, and the reverse.

H To vary the length ofthe offset portion 26 of the coil13, the upper side of theblock; 16, forward ofthecrimping member 15,.Figs 2, .3, 16, 17 and 18, has a groove 48 in which is forwardly and rearwardly slidablefa gage "member 49, the forward end ofwhich is adapted to engage the front side'of the 'coil 131at the left of and close to thecrimping member 15 as viewed in Figs. 2 and 16. By adju stingthe gage member 49 forwardly and rearwardly, thelengthof the offset portion 7 .26 is ohaiiged. ,To hold the gage memberin its adjusted-position, it is provided with a slot 50 through which extends a vertical bolt 51,-thelower .e'nd ofwhich has threaded engagement with the block 16, and the head of which is adapted to bear on the top of the gage member 49.

A horizontal forwardly and rearwardly extending bolt 52'is'fitted in a threaded hole "in the block 16 and has its inner end bearing againstthe front end 'of the gagefmember 49 to hold the latter fromfmoving forwardly after :it hasbeen adjusted.

To regulate the length'the stem 28 shall be, there is provided on the bodyl, at the right of the guard 12, Fig. 3, a forwardly and rearwardly adjustable gage member 53, which hasa lateral ar'm54 and a longitudinal slot The free end of the stem portiong28 of the coil is adapted :to bear against the lat-' eral arm 54. By adjusting the gage member 53 forwardly and rea-rwardly, the length ofthestem'portion 28 can be varied as desired. Two vertical bolts 56 extend through theslot and have their lower ends fitted" .in rthr eaded holes in the body 1, the heads of the boltsb'eing" adapted to bearon the 'top of the gage member 53,-to hold the latter in the position to'which it may be adjusted.

To bendthe coil 13 to form a should 57 Figfll, where theknot 58 islto be made,

and to hold the coilwhile theknot 58 ,is being formed, a substantially horizontal transverse bending and holding lever 59, Figs. 1, 3, 13 and 14, attheleft of the slotted coil holding post 10, as viewed in'Figs. 3, 13 and. 14, is pivoted on a'horizontal rearward- I 1y extending bolt 60 mounted .inabracket 61 1 supported by and over the body 1 of the machine. I i v The rightend of the lever 59'is adapted to press on the upper side of the coil 13, just to the left of the post 10, Figs..3 and 13,

and cause the stem portion QS'itO'bG ioo upward to the position shown in ,dotted lines in Fig. 13, thus formingth'e shoulder 57, Fig,

1 1,1 and shown in dotted lines in Fig. 13.

To so tiltthe 'lever 59, it has, at the left of the bolt 60, Fig; 13, verticallyadjustable in it the threaded upper end of a vertical bolt 62 on which are mounted two washers 63 which respectively bear against the upper and lower sides'of the lever-59 and having respectively bearing against them two nuts 64 on the bolt 62. The lower end of the bolt 62 carries a roller 65 which bears on the .up-

" per side of a rearwardly extending lever 66,

the irearend of which is pivoted on a horizontal transverse bolt 67 mountedpon the body 1, Figs-. 1, 2, 3and .13. The lever 66 rests upon and is lifted by a'cam 68 on the main shaft 3, once during each revolution of the latter. I I

A vertical coil spring 69 has its upper end fastened to the outer or left end of the lever 59, as viewed in Figs. 3 and 13, the lower end of the spring being fastenedto a bracket 7 O fastened to the body 1, Figs. 1 and 2. The

tension of the spring 69 normally swings'the outer end of the lever 59 downwardly to the position shown in solid lines in Fig. 13, when the cam 68 permits the lever 66't0 swing downwardly to the position shown in Fig.

'2 and in solid lines in Fig. 13, thus releasing the coil 13 from thelever 59 as the knot 58 the lever 7'7 has pivoted to it the upper end spring is. being completed, and permitting the stem portion 28 to pass under the lever 59, as said stem portion is being pressed by the knotting arm 71 to the straightening position, shown 71 of the knotter arm 72 has anotch 73 at its free end, which is above the stem portion 28, before the latter is tilted upwardly by the lever 59, as shown in solid lines in Fig. 13, but which, after the stem portion 28 has been bent to the position shown in dotted lines in Fig. 13, is adapted to receive said stern portion, when the shaft and arm 71 are revolved clockwise, as viewed in Fig. 14.

To revolve the said shaft 72 and arm 71 in said direction, said shaft 72 has attached to and adapted to be wound on its periphery one end portion of a cable 74, Fig. 1,

which-cable passes laterally to and on a pulley 75 mounted in the top of a vertical bar 76, the cable 74 passing thence downwardly and being attached at its lower end to the rear end of a rearwardly extending lever 77 pivoted by a horizontal pin 78 to the body 1. The bar 76 is fastened at its lower end to the body 1'.

* The lever is depressed so as to draw downwardly the cable 74 to turn the knotting shaft 72 in the knotting direction by a cam 79 on and revoluble with the main shaft 3. which cam is so set and formed as to depress the lever 7 7 after the offset 26 has been formed in the coil 13.

To retract the knotting shaft 72, after it has been turned to form the knot 58, a coil 80 encircling the shaft 72 has one end fastened to said shaft and its other end fastened to the bracket 61.

To normally swing the lever 77 upwardly, when the cam 79 so permits, the rear end of of a normally upright rod 81, Fig. 1, by a transverse pin 82. The rod 81 is slidable in abearing 83, which bearing'is oscillative on a horizontal rod 84 fastened to one of the legs 2 of the machine. A pull spring 85 encircling the rod 84 has its lower end attached I to the lower end of the rod 84 and its upper end attached to the bearing 83.

In the operation, a spring is placed with its coil 13 in the slot 11 of the post 10, and in theslot 14 of the crimping member 15, with the free end of the stem portion 58 against the arm 54 of the gage member 53.

The pedal 9 is then depressed to establish driving connection between the driving pulley 4 and the shaft 3, through the clutch mech- 'anism 5. The main shaft will now be revolved, and through the cam 45, roller 46, link 42, bar 38 pushing member 36 and screw 47, the member 32 will be forced forwardly, against the pressure of the retracting spring 35, thus swinging the crank 30, by means of the roller 29, thereby turning the crimping member 15 to the position shown in Fig. 16,

and thus forming the offset portion 26 in the coil 13. V

The cam 79 will swing. downwardly the lever 77, thus through the cable 74 turning the knotting shaft 72 and its arm 71 clockwise as viewed in Fig. 14. In the meantime, the cam 68 will lift the lever 66, thus through the roller 65, bolt 62, washers 63 and nuts 64" swinging the lever 59 so that its inner end will engage the upper side of the coil 13 and bend the coil to form the shoulder 57 and to cause the stem portion 28 to assume the po: sition shown in dotted lines in Fig. 13.

The arm 71' will now engage the raised stem portion 28 and will carry such r'tion first over the coil 13, and then under t e next coil above, designated by 86, Figs. 3, 11 and 12, and against the shoulder 57, the cam 68 in turning permitting the s ring 69 to swing upwardly the inner end 0 the lever 59, so tlhat the stem portion 28 can pass thereun- The arm 71' carries the stem portion 28 against the left end, Figs. 3 and 6, of a stop plate 87 which is secured on a rearwardly extending shaft 88, Figs. 4, 5 and 6, oscillatively mounted in a member'89, which is adjustable horizontally transversely on a bracket 90 fastened to one side of a block 91, which has dove-tail forwardly and rearwardly slidable connection with the body 1, Fig. 21, the block 91 being a part of the mechanism for forming the hook 27 at the end of the' stem portion 28, and being forwardly and rearwardly adjustable to accommodate the mechanism for forming the hooks 27 on stems 28 ofdifferent lengths.

The member 89 has extending vertically through it a securing bolt 92 which extends through a slot 90 in the bracket 90, a nut 93 being mounted on the bolt 92 and bearing against the under side of the bracket 90. B loosening, the nut 93, the member 89 with the stop plate 87 may be adjusted to the right or left to suit conditions as to form and length of the stem portion 28.

When the arm 71 of the knotting shaft 72 brings the stem portion 28 of the coil under the lever 59, it presses the stem portion 28 against the left edge of the plate 87, Fig. 6, and straightens the said stem portion from the arcuate form which it had, as shown in Fig. 22.

From the rear side of the sto plate 87 extends transversely an arm 94wliich bears on the periphery of a rotary hook forming member 95, which is fixed on the forward end of a horizontal rearwardly extending rotary shaft 96,- which is rotative in bothdirections inthe block '91. A coil spring97 has itslower end fastenedt'o the plate 87, at the right of theshaft 88, Fig. 6, saidspring having its upper end attached to a lateral arm of a right angled rod 198, thelowerend of'which is fastened to the member 89. The spring 97 holds the arm 94 against the top of the hook forming g to retract the knottingf'shaft 72, so as toretract the knotter arm 71'to its originalinitial starting position, Fig. 14.- The stein portion 28, thus "straightened and released from the arm 71, will spring from the position shown glin Fig. 22 to-the left Where it will contact a with and be stopped by the vertical edge99 of a stop plate100, Figs. 6,21, 22 and 23.

Said stop plate is pivoted to the front side of the block 91 on a forwardly extending pin. g-e101 on said block 91. A'horizontal coil spring 102 fastened at one end-to a pin 103 in the block 91, and attached at its other end to a pin 104 inthe stop, platexl00, below the pin 101, normally swings'the stop plate 100,, so

,,,.;ahat vertical ,edge99 extends above the uppersideof the adjacent front side of-the block 911, so as toengage and hold thestraight' ened ,stem' 28 from .moving further. to; the

forming member 95 i's-located and into which ',:iscarried by the member 95 therear portion of the stem portion 28li-n the formation of the hook 27. a

The front wall of the recess 106, designated by l07 has in its upper side astop shouldern .0; 108 which alines with the .wall 99' of the'stop l' member 100, when the latteris in thestopplng position shown in Figs. 20,21and 22. The

shoulder 108 to relieve the stop ,member, 100 of undue pressure bythewire whenthe ghookisformed. l

The wall 107 has'a hole therethrough which alines with an axial hole that extends through the shaft 96 and the hook forming member 9.5.

Longitudinally'slid'able"in the hole in the. -shaft 96 andinto the hole108" inthe wall l07isfa rod 109'comprising a'mandrel around which the" hook 27 is formed by the member- 9, c 8 After the stem portion'28 has been straightened andfreleased frornth'e arn'a 71', it assumes the position shown in Figs22, in which positionitis againstthe shoulder '108and against the wall- 99 ofthestopmember100. If now the shaft .96-andhook forming member 95 .iarez revolved.counter-clockwise, as: viewed in that the stem the front end and at one side of the mandrel 109 will engage: the stem portion and will carry it around the mandrel to the position shown in dotted lines in Fig.8, thus completing the hook 27.

the upper edge of the wall 107 by the transverse portion 111 of a Tshaped lever 112, the rearwardly extendin stem of which is pivoted on a transverse orizontal bolt 113 mounted in-the block 91, Figs. 2, 3, 4 and 7.

it vertical spring 11 1- I has its lower end attached to the stem 112 of the lever 111, forward of the pivot bolt 113, the upper end of the spring being attached to the lateral arm of a. right angled rod 115, the lowerend of which is mounted on the block .91. The spring 114 normally swingsthe lever so as to lift its front transverse part 111 upwardly from the upper edge of'the wall 107, so

27, after it hasbeen formed being withdrawn.

' After the stem portion 28 has been'carri'ed by the arm 71 to the straightening position, and has been released, so as to spring against the shoulder 108 and the stop plate wall 99,

Figs. 8 and 21, and in Fig. 6,'a hook 110 en portion 28 of the coil 13, can" and against 7 c '0 The stem portion 28 is held down against I the lever 111 is swung so as to bring the front i transverse part 111 to the closed position, left, Fig. 6. A stop pm" 1n. the:blo ck 91;. sailimits the movement by the spring 102 of the stop plate 100, Figs- 6 and 21. i As shown in Fig.7, the block 91has in its: upper side 'a vrecessh106 in. which the hook viewed'in Figs. 6, 8 and 21, to formthehook 27.

For swinging therear end of the lever stein 112 upwardly and the-transverse part 111 of the lever downwardly to the stem hold-, ing' position, shown in Fig. 21, the shaft 96 has fastened to it, a circular cam member'l16 having a peripheral notch 117 adapted to receive therear end portion of the leverstemv 112, Figs. 5 and 7, also Figs2 and 1. This notch is adapted to register'with aperipheral notch 118'in a nearly circular cam, 119, which, is revoluble on'the shaft 96 and is revolubly fitted in a hole 120in a vertical plate 121 fas- I tened to therear end of the block 91 forward of the cam member 116. The hole 120 has an upward extension 122'adapted to receive the lever stem 112, when the latter rides on the] peripheries of the cams 116 and 119.

When the cams 116 and 119 are in theinitial starting position, the notches 117 and 118 are in register, and I the sp I ring. 114 swings the lever stem 112'into the. notches 117and 118, as shown in Figs. 5 and7. A'pin 123,

9.6 is revolved, clock-wise, 5 and counter-clock-wise,

16$ the hook fllo f flig Fig. 5, is thenextending from the cam 119 flu,

through the left end of an arcuate' slot 124..

front end of the hook forming member 95 wi1l enga e the stem portion 28, after the shaft 9 6 as turned the cam 116 so as to swing upwardly the rear end of the lever stem 112 and downwardly the front trans- ?verse'part 112 to the stem holdin position. After the shaft 96 has so revolved far enough toform the U shaped hook 27, the shaft 96 and with it the hook forming member 95 will be'retracted, the rod mandrel 109 will 1 beretracted out of the hole 108 in the wall 107 and the lever stem 112 will enter the notches 117 and 118. When the cam 116 has revolved clock wise about a quarter of a rev olution, as viewed in Fig. 5, the pin 123 will reach the other or right end of the arcuate slot 124, and the cam 116 will turn the cam 119 clock-wise until the hook has been formed. The cam 116 will then retract, but will not engage the pin 123 until it has retractedtibout a quarter of a revolution, after which the cam 116 will retract the cam 119 until both reach the initial starting position, shown in Fig. 5.

F or turning the shaft 96 in both directions,

= it has secured ,to it a pinion 125, Figs. 1, 2, 3 and 4, which meshes with a vertical rack 126 vertically slidable in the body 1, and having pivoted to its lower end the rear end of a substantiallyhorizontal rearwardly extending lever 127, Fig. 2, the front end of which is pivoted by a horizontal pin 128 to the 1 cam 129 on the main shaft 3 is adapted to engage the upper side of the lever 127 and depress the same, thus forcing downwardly the rear end of the lever 127 and with itthe rack 126, which will turn the pinion so as to rotate the shaft 96 in the hook forming direction described hereinbefore.

To retract the rack 126, the lever 127 and the pinion 125, a vertical coil spring 130 has itslower end attached to the lever 127 and its upper end attached to the body 1, Fig. 2.

To force the mandrel 109 forwardly into its operative position, it has attached to its rear end portion the upper end of an oblique bar 131, Fig. 2, the lower end of which is fastened on the rear end portion of a rearwardly extending horizontal bar 132 slidably mounted in bearings 133 and 134 on the body 1.2 To force the bar 132 forwardly and with it the bar 131 and the mandrel 109, a coil spring 135 encircling the bar 132, bears at its rear end against the bearing 133, and at its forward end against a collar 136 fastened on the bar 132. r

To force the bar 132, bar 131 and mandrel 109 rearwardly against the pressure of the spring 135, an upright bar 137 is pivoted at its lower end on, horizontal pin 138 on the body 1, the rear side and upper portion of the bar 137 bearing against the front end'of the bar 132. A cam139 on the main shaft 3 is 06 adapted, when the shaft 3 is revolved to, at

the proper" time engage the forward side of the bar 137 and force the smeflndthe bar182 rearwardly, so as to force the mandrel 109 rearwardlyto its inoperative position.

Sets screws 140 in'the block 91, hold itin the positions to which it may be adjusted on the body 1, Figs. 5, '6, 7 and 21.

In the operation of-the machine, the screws 56 are loosened and the gage member '58 adjusted to suit the length that the portion of Elie stem extending beyond the knot 58 is to The set screws 140 are loosened, and the block '91 is adjusted on the body 1 to suitthe len th of the stem portion28.

. he bolt- 92 is loosened, and the member 89 adjusted to itsproperitransverse position. The screws56 and 140, and the bolt?) are then tightened, and the spring to be formed is placed with its-coil '13 disposed inthe slots 11' respectively ofthe post lllandthecn'mping member 15, with the free end of the'stem portion against the arm 54 of the gage member 53.

The screws 51 and 52 are adjustedto position the gage member 49 to suit the length desired for the offset 26.

The blocks 17 and 16am adjusted to suit the diameter of the coil 13, and held in the adjust/ed positions by means of the screws 19; 21, 22,24 and 25, as has beendescribed.

The pedal 9-is nowdepmssed, thus operating the clutch 5to connect the driving pulley 4 with the main shaft'3.

Upon the shaft 3 revolving,the crimper member 15 will be turned tomake the o'fiset 26 in the coil 13, and-the lmottings'haft'72 will be turned so as to cau'seits arm 71 to engage the upturned portion 28 of the coil 13. the lever 59 first having'been tilted to form the shoulder 57 in the coil and to bend upwardly the portion 28. p i

The arm 71 will carry the portion 28 over the coil 13 and then under the next coil 88 grsid against the shoulder 57, to form the'knot The arm 71 will bring the portion 28 against the stop plate 87 and will straighten it, following which the arm 71 and its shaft 72 will be retracted. upon which the lever 111 will be pressed downwardlv upon the nor tion '28, which now lies against the shoulder 108 and the wall 99 of the spring stop plate 100. I I

The shaft96 which has been ;in the meantime started rotating will carry the hook forming member 95 to a position in which the hook 110 will engage the apoition 281$ the rear of the wall 107. In the meantime, the mandrel 109 will have been rimmed into the hole 1081. 30 thstasitheihook H0 cirries the portion 28 around in the recess 106 backofthewall 107, the'portion 28 will be wound partly around the mandrel 109 and J8 member 95.

a-member adjustable transversely the hook 27 will be formed at the end of the stem 28. a 1

The lever portionlll will now be lifted, and the shaft 96 retracted and with itth-e Themandrel 109 will be retractedinto the member 95 and the hook 2? will be free to be removed, as will the formed spring, the operations having been completed.

Various modifications of my invention,

'within the scope of the appended claims, may

be made without departing from the spirit of my invention.

WhatI claim is 1. Ina hook forming machine, the combination with a support for holding a coil, an oscillatory crimping member adapted to engage and crimp said coil, supporting means for said crimping member forwardly and rearwardly adjustable on said support, and

a means for. oscillating said crimping member,

of a stop gage adjustable toward and from said crimping member on said supporting means and in the path of said coil.

2. In ahook forming machine, the combi- "nation with a support for holding a coil, and

a driving shaft rotatable ,on said support, of a crimping member having means for engaging. and cr mp ng St1d COll, supporting means on which said crimping member 18 oscillative, a member reciprocative on said supporting means and engagingand adapted, when reciprocated to oscillate said crimping member, and means actuated by said shaft for reciprocating said reciprocative member.

3. In a hook forming machine, the combination with a support for holding a coil, and a driving shaft rotatable on said support, of

an oscillatory crimping member having a crank, supporting means on which said crimping member is oscillative, said crimping member having means for engaging and crimping said coil, a member reciprocative on said supporting means and engaging said crankfor oscillating said crimping member, means actuated by said shaft for moving said reciprocativemember in one direction, and

' reciprocative member.

vided with a crank, a member reciprocative' 5. In a hook forming machine, a support, a member adjustable forwardly and rearwardly on said support, a crimping member oscillative in said member and having at its upper end a slot for receiving a coil and proon said adjustable member and engaging said crank for oscillating saidcrimping member, a spring for-moving said reciprocative member in'one direction, and means for movingsaid reciprocating member-1n the opposite dlrection.

6. Ina hook forming machine, a support,

a supporting means adjustable forwardly and rearwardly on said support, a hook form-- ing member. rotatable in both directions on said supporting means and having means for engaging the stem portion of a coil and revolving said portion around the axis of said member, a mandrelalining with the axis of said member and around which said portion: 1s revolved, and meansfor turning said meme her in one direction to form a hook on said portion and for retracting said member;

7. In a hook forming machine, a support, a supporting means adjustable forwardly and rearwardly on said support, a hook forming member rotatable in both directions on said supporting means and having means for en gaging the stem portion of a coil and revolving said portion around theax'isof said member, a mandrel alined with the axis of said member and slidable-to and from a position in which said portion willbe revolved around it, means for turning saidmember in one direction to form ahook onsaid portlon andfor retracting said member, and means for moving said mandrel to and tion. 7 i

8. Ina hook forming chine, a support, means thereon for holding anend coil of a spring and for bending out of the plane of said coil an end portion thereend portion f of, means for knotting said around said coil and for forcing said end por tion to a laterally outwardly extending position, means for forming a hook at the free end of said end portion, and means for crimping said coil at a point substantially diametrically opposite to saidknotted portion.

9. In. a hook forming and knotting machine, a support, means thereon for holding a an end coil of a spring and-for bending out" of the plane of said coil an end portion thereof, means for knotting said end I portion around said coil and for forcing said end portion to a laterally outwardly extending posi-- tion, means adjustable toward and from said coil holding means for forming a hook at the free end of said end portion, and means for crimping said coil at a point substantially diametrically opposite to said knotted portion.

10. In a hook formingand knotting machine, a support, means thereon for holding an end coil of a spring and for. bending out I of the plane, of said coil an end portion thereof, means for knotting said end portion from said pOSi-.

and knotting maeo, I

around-said coil and for forcing said end p tion to a laterally'outwardlyextending position, means adjustabletoward and from said coil holding means for forminga hook at the free end of said end 'portion, and means adjustable toward and from and transversely I to said coil holding means for engaging and crimping said coilat a point substantially diametrically opposite to said knotted portion.

11. In a hook forming and knotting machine, a support, means thereon for holdmg an end coil of Spring and for bendin out of the plane of said coil an end portion thereof, means for knotting said end portion around said coil and for forcing said end portion to a laterally outwardly extendingpof diametrically opposite said knotted portion and having a crank, a reciprocative member engaging and adapted to oscillate said crank and crimping member, and means for reciprocating said reciprocative member.

go" 12. In a coil crimping mechanism, a support, means thereon for holding an 'end coil of a spring, an oscillatory crimpin member having means for engaging and orming a crimp in said coil and having a crank, means at supporting said crimping member adjustable in two directions at right angles to each other, and means engaging said crank for oscillating saidcrimping member.

13. In a coil crimping mechanism, a sup- 36 port, a crimping member oscillative thereon having means for engaging and crimping a coil of a spring and having a crank, a reciprocative member engaging said crank and adapted to oscillate said crimping member,

'- means for moving said reciprocative member in one direction, and a spring for moving said reciprocative member in the opposite direction.

14. In a coil crimping mechanism, a supm port adjustable in two directions at right angles to each other, a coil crimping member oscillative on said support and having a crank, a member engaging said crank and reciprocative on said support, and means for reciprocating said reciprocative member.

In acoil crimping mechanism, a support, a coil crimping member oscillative on said support and having a crank, a member engaging said crank and reciprocative on said support for oscillating said crimping memher, a spring for forcing said reciprocative member in one direction, supporting means on which said support is adjustable in two directions at right angles to each other, and

means for moving said reciprocative member in the opposite direction against the pressure of said spring.

16. In a'hook forming mechanism, the combination with'a support, and means thereon for holding an'end coilof a spring, of a block adjustable on said support toward and from said coil holding-means, means carried by said block for releasably clamping against said block an end portion of saidcoil, a hook forming member rotatable in opposite directions on said block, an axial mandrel slidable in said hook forming member to and from a position in which it projects therefrom, said hook forming member having means for engaging said end portion of said coil and form-' ing it around said mandrel, when said hook forming member is rotated in one direction, means for alternately rotating said hook forming member in said directions, means for moving said mandrel to said projecting position, when said hook forming member is operatively engaging said end portion, means for retracting said mandrel after the hook has been formed, means for forcing said clamping means to the clamping position, and means for retracting said clamping means from said clamping position after the hook has been formed. 1

17. In a hook forming mechanism, a support, a 'hook forming member revoluble thereon in opposite directions, a plate on said block having a hole therethrough, a cam revoluble in said hole and on said member having a peripheral notch, a second cam on and revoluble with said member and having a lost motion connection with and adapted to revolvethe first cam in both directions and provided with a peripheral notch adapted to register with the notch in the first cam, a wire clamping lever extending through said hole and adapted to ride on said cams and to be held thereby in the clamping position, and adapted to enter said notches when the notches are alined and swing out of said clamping position, and movable by said second cam to the clamping position, and means for revolving said hook forming member in both directions. a I

18. In a hook forming mechanism, a support, a hook forming member revoluble thereon in opposite directions, a cam revoluble with said member and having a peripheral notch, a second cam revoluble on saidmember and having a lost motion connection by which the first cam revolves the second cam, said second cam having a notch adapted to register with the notch in the first cam, means for revolving said member in both directions, and a wire clamping member adapted to' ride on said cams and to be held thereby in the a clamping position and to move to the non' clamping position when it enters said notches, and movable by said first cam to the wire clamping position.

In testimony whereof I aflix my si ature.

CARL KIRC NER. 

